package com.zjm.zdk;

import java.util.HashMap;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentHashMap;

public class CHashMapUseCase {
    public static void main(String[] args) {
        HashMap map = null;
        ConcurrentHashMap cMap = null;
        TreeMap treeMap;
        Object obj;
    }
}
